It's funny, I can see how being a doctor amplifies paranoia, since you now know of all kinds of horrible afflictions that could strike. I can also see how it reduces worrying since you are a trained medical professional.
Thus an orthopaedic surgeon would be foolish to self-manage his hypertension. He needs a general practitioner or a cardiologist to look after that domain.
A cardiologist would be foolish to look after his diabetes. He needs a general practitioner or an endocrinologist to look after that domain.
A general practitioner would be foolish to self manage anything significant. He would need another general practitioner who could look at his problem objectively or an appropriate sub-specialist.